<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      body {
        background-color: black;
        cursor: pointer;
      }

      /* 小球 */
      .ball {
        position: absolute;
        border-radius: 50%;
      }
    </style>
  </head>

  <body>
    <script src="./index.js"></script>
    <script>
      document.addEventListener('mousemove', function (e) {
        new Fn(e.clientX, e.clientY);
      });
    </script>
  </body>

  </html>
</html>
